Seiko Bell-Matic Ref. 4006-6050 (Oktober 1974) Taucheruhr The case back is transparent

The case back is transparent and offers a fascinating view of the mechanical perfection

Lug-to-lug: 42 mm

New leather strap fitted

This Seiko hand-wound watch

Seiko Bell-Matic Ref. 4006-6050 (Oktober 1974) Taucheruhr The case back is transparentA rare and distinctive Seiko Bell Matic automatic wristwatch with a mechanical alarm, manufactured in October 1974. This series is among the most technically sophisticated vintage models of the 1970s and was one of the first automatic wristwatches in the world with an integrated alarm mechanism. Technical data Reference: 4006 6050 Serial number: 400135 (October 1974) Movement: Seiko Calibre 4006A, automatic winding with mechanical alarm, 17 jewels